Safety device for liquid-measuring apparatus



"Oct. 9, 1928.

H. WYDLER SAFETY DEVICE FOR LIQUID MEASURING APPARATUS 2 Sheets-Sheet 1 Filed Aug. 4, 1925 Oct. 9, 1928.

H. WYDLER SAFETY DEVICE FOR LIQUID MEASURING APPARATUS Filed Aug. 4, 1925 2 Sheets-Sheet 2 l/I/Illl/I m m% N d! F M E w/ m M 7 v M 1 3 7 5. l 0 2 h IlIIIIIIlIIIII/l Patented @ct. Q, 1928 warren STATES PATENT OFFICE.

HERMANN \VYDLER, OF BERN, SVJITZERLAND, ASSIGNOR TO SAUSER S. A., 0F SOLEURE,

\VI'I'ZER-LAND.

SAFETY DEVICE FOR LIQUID-MEASURING APPARATUS.

Application filed August 4, 1925, eel-m1 No.

The present invention relates to liquid measuring apparatus of the kind where two gauged vessels are alternately filled and discharged by means of a pump in order to obtain an uninterrupted delivery of measured liquid and where a reversing device operated by the liquid pressure itself is adapted to al ternately open and close the inlets and outlets of said vessels.

The object of the present invention is a safety device which allows the reversing movement only after the complete emptying or the complete filling of one of the vessels. A premature working of the reversing de vice which could be caused by certain fraudelous tampering would result in errors of measuring.

The safety device according to the present invention comprises a chamber communicating with the discharge neck of the apparatus, of a float within said chamber, a venting cock communicating with the suction pipe of the pump and of means establishing the operative connection between said venting cock and said float.

If any fraudelous tampering with the apparatus should be tried by damming up the outflowing liquid in the discharge neck this liquid will fill the chamber and lift the float and open the venting cock so as to cut-ofi the suction or the delivery of the pump.

In the accompany drawing the safety de vice which is the object of the present invention is shown combined with an apparatus fully described in my United States patent application N r. 48,148 filed Ang. 4, 1925.

Fig. 1 represents a front View of the general arrangement;

Fig. 2 a vertical section in a plane perpendicular to the plane of Fig. 1, and

Fig. 3 a vertical section in a parallel plane to that of Fig. 1.

As shown in the drawing two gauged vessels 7, 8 are connected by two elbow pipes 5, 6 which are the inlets and outlets of the gauged vessels to a reversing device and a hanc I pump 1 is adapted to supply the liquid through a pressure conduit 2, 3 into the top of said reversing device. 9 and 10 are venting devices of the gauged vessels and are communicating with a generalventmg pipe 12 opening at 11 into the free air. This venting pipe 12 communicates through a neck 13 with the inside of the reversing device and through this inside and through the hollow plug 48,147, and in Switzerland August 6, 1924.

58 of a venting cock 59 and a neck 61 with a pipe 14 branched off from the suction pipe of the pump in such a way, that when said cock has opened the free passage from pipe '14 to the inside of the reversing device the the plug of said cock so as to cause alternately the admission and the discharge of said gaugedvessels. The amplitude of the oscillations of they plug 16 amounts to an angle of 90, whereof the first half is completed under the eii'ect of the liquid pressure working said flap 17 within the chamber 44, while the second half of the oscillation is completed under the effect of a helical spring 32 which has been bent during the first half of the oscillation.

The canal 21 of plug 16 communicates through a branch 23 with an interior chamber 24 which is separated by a plate 25 from an exterior chamber 26 at the end portion of the plug. Ports allow communication at the proper times from the chamber 24 to the chamber 44 selectively on opposite sides of the flap 17. A slotted sleeve 28 rigidly fast to said flap 17 is fitted rotatably to the end part of the plug and is moved by the flap while it takes the plug along with it. After this movement of the plug executed jointly with the sleeve the plug will have bent the helical spring 82 one end of which is attached to a stay pin 33 while the other end is fast to one arm of a lever 34 which is integral with a square shank 35 stuck into and carried along by the plug 16. Chamber 24 admits the liquid alternately on both sides of the flap and chamber 26 facilitates the escape of the displaced liquid within chamber 44. The dischargeneck 15 of this reversing device comprises an enlarged portion formed by a chamber 55 which encloses a float 56. This float by means of links and levers 57 is in working connection with the plug 58 of cock 59. If the outflow of the discharged liquid happens to be dammed up the liquid will fill the chamber 55 and lift float 56 and will open the cock 59 and cut-oil the supply of the pump by venting the suction conduct 60 of the same through pipe 14. This arrangement prevents that a buyer of liquid pays for more than he receives.

What I claim as new and wish to secure by Letters Patent is:

1. In a liquid measuring apparatus with two alternately filled and discharged gauged vessels and in combination, a safety device comprising a chamber intercalated into the discharge conduit, a float in this chamber depending on the level of the liquid in this chamber, means communicating with the liquid supply pipe of the apparatus so as to cut off the liquid. supply and means transferring the movement of the float unto the means mentioned before whenever the level in said chamber has risen to a certain amount.

2. In a liquid measuring apparatus with two alternately filled and discharged gauged vessels and in combination, a safety device comprising a chamber intercalated into the dischar e conduit, a float depending on the level of the liquid within said chamber, a liquid supply pump, a conduit for venting the suction pipe of the pump, an air relief cock controlling this conduit and means transferring the movement from the float to the cock so as to open the air relief cock whenever the rising liquid in the chamber has lifted the float above a certain level.

In testimony whereof I affix my signature.

HERMANN VVYDLER. 

